Details, datasheet, quote on part number: PDM41532SA-20I

The is a high-performance CMOS static RAM organized x 16 bits. The PDM41532 features low power dissipation using chip enable (CE) and has an output enable input (OE) for fast memory access. Byte access is supported by upper and lower byte controls. The PDM41532 operates from a single 5.0V power supply and all inputs and outputs are fully TTLcompatible. The PDM41532 comes in two versions, the standard power version PDM41532SA and a low power version PDM41532LA. The two versions are functionally the same and only differ in their power consumption. The PDM41532 is available 44-pin 400 mil plastic SOJ and a 44-pin plastic TSOP (II) package suitable for high-density surface assembly and is suitable for use in high-speed applications such as cache memory and high-speed storage.

NOTE: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. Appropriate thermal calculations should be performed in all cases and specifically for those where the chosen package has a large thermal resistance (e.g., TSOP). The calculation should be of the form: * ja where Ta is the ambient temperature, P is average operating power and ja the thermal resistance of the package. For this product, use the following ja values: SOJ: 59o C/W TSOP: 87o C/W